Gland-nut lock.



No. 838,833. PATENTED DBG. 18, 1808. v. L. ALLEBAGH.

GLAND NUT LUCK.

APPLICATION FILED .TULY30. 1906;

IW z/en mmm/33388.

VICTOR L. ALLEBACH, OF EAST BRADY, PENNSYLVANIA.

GLAN D-NUT LOCK.

Specification of Letters Patent.

Patented Dec. 18, 1906. I

Application filed J'uly SO, 1906. Serial No. 328,416.

T0 all 7/f7mm, :it ntcty/ concern:

Be it known that I, Vieron L. ALLEBAon, a citizen of the United States of America7 residing at East Brady, in the county of Clarion and State of Pennsylvania, have invented certain new and useful Improvements in Gland-Nut Locks, of which the following is a speciiication, reference being had therein to the accompanying drawings.

Thisinvention relates to a combined glandnut lock and piston-swab for air-pumps especially designed for use with railway airbrale systems.

The primar)T object of the invention is to provide effective means for preventing the turning of the gland-nuts of an air-pump.

A further object of the invention is to also provide a piston-swab adapted to encircle the piston of an air-pump within the center piece between the steam and air cylinders of the pump and to support said swab by the locking devices of the gland-nuts.

The construction of the improvement will be fully described hereinafter, in combination with the accompanying drawings, which form a part of this speci'lieation, and its features of novelty will be delined in the appended claims.

In the drawings, Figure 1 is a longitudinal sectional view of the center piece of an airpump with one of the gland-nuts shown in elevation and with my improvement applied thereto. Fig. 2 is a plan view of a blank from which the piston-swab is formed. Fig. 3 is a side elevation of the combined glandnut lock and piston-swab. Fig. 4 is a top plan view of the same 3 and Fig. 5 is a detail perspective, on an enlarged scale and broken away, showing the connecting means for the ends of the swab.

The reference-numeral 1 designates thecenter piece of an air-pump, which is interposed between the steam-cylinder and the air-cylinder of the pump and formed with threaded openings 2 for the reception of the oppositely-disposed bushings 3 and 4, containing the packing-glands 5, through which the piston 6 extends.

The numeral 7 designates the usual glandnuts formed with vertically-disposed grooves 8. Surrounding the piston 6 centrally between the nuts 7 is a piston-swab comprising a metallic band 9, bent to form a ring, from the edges of which project iingers 10, bent inward at right angles to the body of the band to support a packing 11. The ends 12 and 13 of the band are bent outward to overlap each other, and one of said ends .12 is provided with a catch-button 14, adapted to engage within a T-shapcd slot 15, formed in the end 13 and having lugs 16 on opposite sides of its contracted portion to secure the button 14 detachably.

Secured to diametrically opposite points on said band 9 are two spring-arms 17, the central portion 18 of each of which is bent inward for attachment to the outer side of the band 9 by rivets 19. This brings the ends of each arm in vertical alinement and in position to be sprung into the verticallyalining grooves 8 in the nuts 7, thus securely locking said nuts against looseningor turnmg.

It will be noted that the piston-swab comprising the split metallic ring and its packing serves as a support for the spring lockingarms in addition to its function as a swab for the piston 6.

The improvement provides a very simple but effective means for locking the glandnuts and is capable of being readily applied to or removed from the pump-piston.

@ther means than that shown may be provided ior detachably connecting the projecting ends of the band 9, and I would therefore have it understood that the invention includes all such variations and changes in the details of construction as may be resorted to without departing from the terms and scope of the following claims.

What I claim, and desire to secure by Letters Patent, is

1. The combination with the piston-rod and gland-nuts of an air-pump, of a band surrounding said piston-rod and spring-arms secured at diametrically opposite points to said band and engaging grooves in the edges of said nuts.

2. The combination with the piston-rod and gland-nuts of an air-pump, of a band surrounding said piston-rod and having its ends detachably secured together, and springarms centrally secured to said band at diametrically opposite points, and having their ends fitting peripheral grooves in said nuts.

3. The combination with the piston-rod, and gland-nuts of an air-pump, of a pistonswab surrounding vsaid piston-rod and comprising a split metallic ring, and a packing secured within the ring, and diametrically opposite spring-arms centrally secured to opposite sides of said ring and having their ends engaging grooves in said nuts.

4. The combination with the piston-rod and gland-nuts of an air-pump, of a pistonswab surrounding said piston-rod and Goniprising a metallic band bent to form a ring and having inwardly-projecting fingers along its upper and lower edges and outwardlyn turned detaehably-eonneeted ends, and. a packing 'secured by said lingers, and vertically-disposed spring-arms secured centrallyT to said ring at diainetreally opposite points, the free ends of saidarlns engaging in grooves in said nuts.

5. rlhe combination with the piston-rod and gland-nuts of an air-pump, of a pistonswab surrounding said piston-rod and comprising a metallic band formed with edge r l l i i l l i l l projections, and. a packing secured on the inner side thereof, and spring-arms bent 1nward at their central portions and secured to` said band, so that their free ends will engage in grooves on the peripherles of said nuts.

ln testimony whereof l affix my signature 25 in the presence of two witnesses.

` VICTOR L. ALLEBACH. Witnesses G. WV. BEST, C. E. FALooN 

